Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 301122
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
421 AM PDT THU JUL 30 2015

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRBL 2-4 MPH.       NW-NE 3-6 MPH.
TRANSPORT WINDS               VRBL 2-4 MPH.       SW-W 4-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JUL 31        GOOD.

VENTILATION INDEX (CATEGORY)  40 (POOR).          487 (FAIR).
OUTLOOK FOR FRI JUL 31        544 (FAIR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-5 MPH.          SE 1-5 MPH.
TRANSPORT WINDS               W 2-5 MPH.          SW 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI JUL 31        GOOD.

VENTILATION INDEX (CATEGORY)  53 (POOR).          446 (FAIR).
OUTLOOK FOR FRI JUL 31        445 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRBL 1-3 MPH.       NE-SE 2-6 MPH.
TRANSPORT WINDS               VRBL 1-3 MPH.       SW 4-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI JUL 31        GOOD.

VENTILATION INDEX (CATEGORY)  41 (POOR).          585 (FAIR).
OUTLOOK FOR FRI JUL 31        663 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      375 (FAIR)
ELLENSBURG    564 (FAIR)
GOLDENDALE    495 (FAIR)
TRI-CITIES    462 (FAIR)
WALLA WALLA   536 (FAIR)
YAKIMA        436 (FAIR)
BEND          717 (GOOD)
PRINEVILLE    772 (GOOD)
ENTERPRISE    420 (FAIR)
HERMISTON     412 (FAIR)
JOHN DAY      545 (FAIR)
LA GRANDE     587 (FAIR)
MADRAS        602 (GOOD)
MEACHAM       509 (FAIR)
PENDLETON     461 (FAIR)
REDMOND       696 (GOOD)
SENECA        555 (FAIR)
THE DALLES    230 (POOR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$



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